| In order to consider heterogeneity of geomaterials, a new test device of determiningtensile strength, which can be cooperated with industrial computed tomography, is presented.To overcome the defect that previous research results can not complete high strength indirecttensile strength test at low temperature, a quadrihedron rod is used to take the place of circularcone rod. Friction coefficient of the test device is confirmed Through the experimental testand finite element analysis. And the friction coefficient is used to carry out correspondingnumerical calculation. The indirect tensile test of remolded soil is carried out, which is usedby two different seam wide load module. The test results are contrasted with Brazilian test,double punch test, and ring hydraulic test. The experimental study of asphalt concrete tensilestrength and asphalt concrete cracking rule at low temperature is carried out, which is used bythe test device. The non-uniform sample model of asphalt glue particle materials is created,and the virtual test simulations is developed for it. The influence factor of micro mechanicsbehavior in asphalt glue particle materials is analyzed.Using the results of the numerical calculation, the indirect tensile strength computationalformula for geomaterials of different slit width load module is obtained. The relative test ofremolded soil is carried out, The tensile strength computational formula and the reliability oftest method is verified. The tensile strength and cracking rule of asphalt concrete at lowtemperature is obtained through experimental study which is carried out by the test device.The virtual simulation analysis of micro mechanics behavior in asphalt glue particle materialsindicate that after the test device cooperate with industrial computed tomography, it may bebecome a new testing method which can connect microstructure and macroscopic mechanicalproperty of geomaterials. |
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